Fluid-pressure regulator



E. WEBB. FLUID PRESSURB'REGULATPR. No. 479,234. Patented July 19, 1892.

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EDWVARD WEBB, OF READING, ASSIGNOR TO NELSON CURTIS, OF BOSTON,MASSACHUSETTS.

FLUID-PRESSURE REGULATOR.

SPECIFICATION forming part of Letters Patent No. 479,234, dated July 19,1892.

Application filed May 2, 1892- Serial No. 431,525. (No model.)

To all whom it may concern.-

Be it known that I, EDWARD \VEBB, of Reading, in the State ofMassachusetts, have invented a new and useful Improvement inFluid-Pressure Regulators, of which the following is a specification.

The improvement relates to the cushioning of the main valve in thatclass of fluid-pressure regulators in which the action of the main orhigh-pressure valve is regulated by an auxiliary valve, which in turn iscontrolled by the pressure of the fluid on the low-pressure side of thesaid mainvalve; and it consists in a detail of construction hereinafterfully set forth, whereby the piston of the main or high-pressure valveis directly cushioned in its own cylinder against the full pressure ofthe operating fluid without the aid of a dash-pot.

The single figure of the drawing represents in section apressure-regulator embodying my said improvement.

A is a shell or casting provided with threaded hollow arms I and O,serving, respectively, as the inlet and outlet passage-ways of theregulator, and a cylindrical projection O, serving as the cylinder forthe piston 19 of the main valve V, the said piston portion of which 19fits the interior of said cylinder with a loose fit. A partition (1separates the said inlet passage-way I from the said outlet passage-wayO, and a cylinder-head H separates said inlet passage-way I from theinterior of said cylinder O. A hole Z in said partition a serves as theport forsaid main valve V, while the said main valve or its stemconnecting it with its piston portion 19 works through a hole in thesaid cylinder-head H with a loose fit.

H is the upper cylinder-head, screwing into the cylinder 0, as shown,while B is a cap clamping a flexible diaphragm d to the upper rim of thecylinder O and forming, as shown, achamber D, with aflexible side abovesaid upper cylinder-head H. F is a follower confined within and guidedby the said cap B and a projection of the screw-handle G, screwing intosaid cap, as shown. A spring S, coiled about said follower, keeps thefollower in contact with the diaphragm d and tends topress the saiddiaphragm into the said chamber D.

N is a passage-way cast in the shell A, leading from said outletpassage-way O to the said chamber D.

V is a valve with a fluted stem t, contained within the uppercylinder-head H and opening downward. A projection from the upperportion of said fluted stem in chamber D presses against the under sideof the diaphragm (Z by force of a spring S, coiled around saidprojection, and thus tends to keep the valve V upon its seat; but thesaid valve V is normally open by force of the above-mentioned spring S,which is greater than that of spring S. There is thus normally a minutepassage-way open from the inlet passage-way I on the high-pressure sideof the regulator to the low-pressure side or outlet passage-wayO throughthe space caused by the loose fit of the valve V in the cylinderhead H,the space caused by the loose fit of the piston 19 in the interior ofthe cylinder 0, the passage about the fluted stem 25 of valve V in thecylinder-head H, chamber D, and passage-way N. The passage-way N,however, is much larger than the thread-like passage-ways formed by thebefore-mentioned loose fits of the valve Vand its piston 19, and when inthe operation of the regulator the back or low pressure in the arm 0 issuflicient to overcome the force of the spring S, which has beendetermined by turning the handle G, the valve V closes upon its seat,

lower cylinder-head H, the escape or passage of said fiuid from saidcylinder being slow through the minute passage-way from said cylinder'tothe inlet passage-way I, due to the loose fit of the valve V incylinder-head H.

I claim In a pressure-regulator, the combination,

with the inlet and outlet armsI and 0, par: tition a, provided with portI and pistonvalve V, of the cylinder 0, provided with the twocylinder-heads H and H, cap B, dia- 5 phragm d, passage-way N, and valveV, hav

ing its seat in said cylinder-head H", and a suitable regulating devicelocated in said cap:

B, the said piston-valve Vhaving its piston between saidcylinder-headsfifl and H, substantial] y as described.

EDWARD VEBB. Witnesses:

WM. S. ROGERS,- ABBIE L." PORTER.

